1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
# rp Design Doc
## Stages
The plan is to start out rp as a single file prototype, and then, once the basics are in place, start expanding it.
### Architechture
The interpter is planned to be a stack-supplied state machine, such that all of the input states are stored on the interpreter struct. This is so that key-by-key commands can be handled directly by the interpreter, at least at first. (If this proves to be -too- complicated to implement, an input editor might be investigated, but I feel confident so far)
Eventually, there will be a TUI display. This I hope to write as a function of an immutable borrow of the stack machine.
### Mockups
Main screen, shown all of the time
```
/---------------------------\
| 0.#: 123 |
| 1.#: 456 |
| >2.#: 789_ |
| 3.$: [This is a string] |
| |
| C-h: Help |
| C-r: Registers |
| _: Change Sign |
\---------------------------/
```
Registers screen, shown in slot two if enabled
```
/--------------------------\
| Registers: |
| a.@: {1,[abc], 2} |
| b.#: 3 |
| c.$: [This is a string] |
| i.$: [1+] |
| g.F: f(x)=[x 1 +] |
| |
\--------------------------/
```
Help screen, shown below any other screens, if enabled
```
/--------------------------\
| Help: |
| 1: Arithmetic |
| 2: Trig |
| 3: Graphing |
| 4: Search |
| q: Exit Help |
| |
\--------------------------/
```
|